This appendix is part of the thesis “Status and trend of brook lamprey
(Lampetra planeri) populations in Flanders”. It provides
dynamic maps illustrating the presence- and absence of brook lampreys in
Belgium, as well as the locations of fish migration barriers and
combined sewer overflows (CSO’s). Each map is provided with clickable
and toggleable layers, allowing users to view specific components as
desired. All watercourse of the VHA (Flemish Hydrographic Atlas) can be
viewed when zooming in. The VHA watercourses disappear when changing the
base map due to a bug in coding. This can be resolved by reloading the
page.
Figure B1 show the general overview of the data and populations. This
map shows all electrical sample events with (presence: white) and
without (absence: black) observations of brook lamprey from 1989 until
2023. The populations are also included in the map (populations: colours
shown in legend). When hovering or clicking the presence- and absence
dots, all years in which the location was sampled pop up.
Figure B2 shows the overview of the fish migration barriers. This maps
shows the brook lamprey observations and population delineation with all
types of fish migration barriers that occur in the populations. Extra
information in Dutch (ID, Name, type etc.) is shown for the barriers
when clicking on it.